<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<title>我爱你</title>
	<link href="static/css/zhl.css" type="text/css" rel="stylesheet" />
	<link rel="icon" type="image/x-icon" href="https://cdn.jsdelivr.net/gh/sun0225SUN/photos/img/20210715233345.png">
</head>

<body ondragstart="window.event.returnValue=false" oncontextmenu="window.event.returnValue=false"
	onselectstart="event.returnValue=false">

	<div id="hovertreecontainer">

		<div>
			<h1 id="h1">遇见你，真幸运 </h1>
			<h2 id="h2"> 我想要的很简单：兜里有糖，肚里有墨，手里有活，卡里有钱，未来有你。</h2>
			<p style="color:white;font-size:20px">往后，愿你余生，都是你</p>

			<p>&nbsp;</p>
			<p>&nbsp;</p>
			<p>&nbsp;</p>
			<p>&nbsp;</p>
		</div>

	</div>

	<canvas id="canvas"></canvas>

	<script type="text/javascript" src="static/js/zhl.js">
	</script>
	<script type="text/javascript">

		; (function (window) {

			var ctx,
				hue,
				logo,
				form,
				buffer,
				target = {},
				tendrils = [],
				settings = {};

			settings.debug = true;
			settings.friction = 0.5;
			settings.trails = 20;
			settings.size = 50;
			settings.dampening = 0.25;
			settings.tension = 0.98;

			Math.TWO_PI = Math.PI * 2;

			function Oscillator(options) {
				this.init(options || {});
			}

			Oscillator.prototype = (function () {

				var value = 0;

				return {

					init: function (options) {
						this.phase = options.phase || 0;
						this.offset = options.offset || 0;
						this.frequency = options.frequency || 0.001;
						this.amplitude = options.amplitude || 1;
					},

					update: function () {
						this.phase += this.frequency;
						value = this.offset + Math.sin(this.phase) * this.amplitude;
						return value;
					},

					value: function () {
						return value;
					}
				};

			})();

			function Tendril(options) {
				this.init(options || {});
			}

			Tendril.prototype = (function () {

				function Node() {
					this.x = 0;
					this.y = 0;
					this.vy = 0;
					this.vx = 0;
				}

				return {

					init: function (options) {

						this.spring = options.spring + (Math.random() * 0.1) - 0.05;
						this.friction = settings.friction + (Math.random() * 0.01) - 0.005;
						this.nodes = [];

						for (var i = 0, node; i < settings.size; i++) {

							node = new Node();
							node.x = target.x;
							node.y = target.y;

							this.nodes.push(node);
						}
					},

					update: function () {

						var spring = this.spring,
							node = this.nodes[0];

						node.vx += (target.x - node.x) * spring;
						node.vy += (target.y - node.y) * spring;

						for (var prev, i = 0, n = this.nodes.length; i < n; i++) {

							node = this.nodes[i];

							if (i > 0) {

								prev = this.nodes[i - 1];

								node.vx += (prev.x - node.x) * spring;
								node.vy += (prev.y - node.y) * spring;
								node.vx += prev.vx * settings.dampening;
								node.vy += prev.vy * settings.dampening;
							}

							node.vx *= this.friction;
							node.vy *= this.friction;
							node.x += node.vx;
							node.y += node.vy;

							spring *= settings.tension;
						}
					},

					draw: function () {

						var x = this.nodes[0].x,
							y = this.nodes[0].y,
							a, b;

						ctx.beginPath();
						ctx.moveTo(x, y);

						for (var i = 1, n = this.nodes.length - 2; i < n; i++) {

							a = this.nodes[i];
							b = this.nodes[i + 1];
							x = (a.x + b.x) * 0.5;
							y = (a.y + b.y) * 0.5;

							ctx.quadraticCurveTo(a.x, a.y, x, y);
						}

						a = this.nodes[i];
						b = this.nodes[i + 1];

						ctx.quadraticCurveTo(a.x, a.y, b.x, b.y);
						ctx.stroke();
						ctx.closePath();
					}
				};

			})();


			function init(event) {

				document.removeEventListener('mousemove', init);
				document.removeEventListener('touchstart', init);

				document.addEventListener('mousemove', mousemove);
				document.addEventListener('touchmove', mousemove);
				document.addEventListener('touchstart', touchstart);

				mousemove(event);
				reset();
				loop();
			}

			function reset() {

				tendrils = [];

				for (var i = 0; i < settings.trails; i++) {

					tendrils.push(new Tendril({
						spring: 0.45 + 0.025 * (i / settings.trails)
					}));
				}
			}

			function loop() {

				if (!ctx.running) return;

				ctx.globalCompositeOperation = 'source-over';
				ctx.fillStyle = 'rgba(8,5,16,0.4)';
				ctx.fillRect(0, 0, ctx.canvas.width, ctx.canvas.height);
				ctx.globalCompositeOperation = 'lighter';
				ctx.strokeStyle = 'hsla(' + Math.round(hue.update()) + ',90%,50%,0.25)';
				ctx.lineWidth = 1;

				if (ctx.frame % 60 == 0) {
					console.log(hue.update(), Math.round(hue.update()), hue.phase, hue.offset, hue.frequency, hue.amplitude);
				}

				for (var i = 0, tendril; i < settings.trails; i++) {
					tendril = tendrils[i];
					tendril.update();
					tendril.draw();
				}

				ctx.frame++;
				ctx.stats.update();
				requestAnimFrame(loop);
			}

			function resize() {
				ctx.canvas.width = window.innerWidth;
				ctx.canvas.height = window.innerHeight;
			}

			function start() {
				if (!ctx.running) {
					ctx.running = true;
					loop();
				}
			}

			function stop() {
				ctx.running = false;
			}

			function mousemove(event) {
				if (event.touches) {
					target.x = event.touches[0].pageX;
					target.y = event.touches[0].pageY;
				} else {
					target.x = event.clientX
					target.y = event.clientY;
				}
				event.preventDefault();
			}

			function touchstart(event) {
				if (event.touches.length == 1) {
					target.x = event.touches[0].pageX;
					target.y = event.touches[0].pageY;
				}
			}

			function keyup(event) {

				switch (event.keyCode) {
					case 32:
						save();
						break;
					default:

				}
			}

			function letters(id) {

				var el = document.getElementById(id),
					letters = el.innerHTML.replace('&amp;', '&').split(''),
					heading = '';

				for (var i = 0, n = letters.length, letter; i < n; i++) {
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					heading += letter.trim() ? '<span class="letter-' + i + '">' + letter + '</span>' : '&nbsp;';
				}

				el.innerHTML = heading;
				setTimeout(function () {
					el.className = 'transition-in';
				}, (Math.random() * 500) + 500);
			}

			function save() {

				if (!buffer) {

					buffer = document.createElement('canvas');
					buffer.width = screen.availWidth;
					buffer.height = screen.availHeight;
					buffer.ctx = buffer.getContext('2d');

					form = document.createElement('form');
					form.method = 'post';
					form.input = document.createElement('input');
					form.input.type = 'hidden';
					form.input.name = 'data';
					form.appendChild(form.input);

					document.body.appendChild(form);
				}

				buffer.ctx.fillStyle = 'rgba(8,5,16)';
				buffer.ctx.fillRect(0, 0, buffer.width, buffer.height);

				buffer.ctx.drawImage(canvas,
					Math.round(buffer.width / 2 - canvas.width / 2),
					Math.round(buffer.height / 2 - canvas.height / 2)
				);

				buffer.ctx.drawImage(logo,
					Math.round(buffer.width / 2 - logo.width / 4),
					Math.round(buffer.height / 2 - logo.height / 4),
					logo.width / 2,
					logo.height / 2
				);

				window.open(buffer.toDataURL(), 'wallpaper', 'top=0,left=0,width=' + buffer.width + ',height=' + buffer.height);

			}

			window.requestAnimFrame = (function () {
				return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function (fn) { window.setTimeout(fn, 1000 / 60) };
			})();

			window.onload = function () {

				ctx = document.getElementById('canvas').getContext('2d');
				ctx.stats = new Stats();
				ctx.running = true;
				ctx.frame = 1;

				logo = new Image();
				logo.src = 'ht' + 'tp://ho' + 'vertree.c' + 'om/themes/hvtimages/hvtlogo.p' + 'ng';

				hue = new Oscillator({
					phase: Math.random() * Math.TWO_PI,
					amplitude: 85,
					frequency: 0.0015,
					offset: 285
				});

				letters('h1');
				letters('h2');

				document.addEventListener('mousemove', init);
				document.addEventListener('touchstart', init);
				document.body.addEventListener('orientationchange', resize);
				window.addEventListener('resize', resize);
				window.addEventListener('keyup', keyup);
				window.addEventListener('focus', start);
				window.addEventListener('blur', stop);

				resize();

				if (window.DEBUG) {

					var gui = new dat.GUI();

					settings.gui.add(settings, 'trails', 1, 30).onChange(reset);
					settings.gui.add(settings, 'size', 25, 75).onFinishChange(reset);
					settings.gui.add(settings, 'friction', 0.45, 0.55).onFinishChange(reset);
					settings.gui.add(settings, 'dampening', 0.01, 0.4).onFinishChange(reset);
					settings.gui.add(settings, 'tension', 0.95, 0.999).onFinishChange(reset);

					document.body.appendChild(ctx.stats.domElement);
				}
			};

		})(window);

	</script>
	<audio autoplay>
		<source src="https://api.uomg.com/api/rand.music?sort=热歌榜" type="audio/mpeg">
	</audio>
</body>

</html>